/ Dictionary / Index B buckaroo: Meaning and Definition of Find definitions for: buck•a•roo Pronunciation: (buk'u-r", buk"u-r'), [key] — pl. -roos. a cowboy, esp. a broncobuster. fellow; guy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: buckaroo (Thesaurus) buck and wing buck bean Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language